2031551654261 has 4 divisors (see below), whose sum is σ = 2097085578624. Its totient is φ = 1966017729900.

The previous prime is 2031551654257. The next prime is 2031551654269. The reversal of 2031551654261 is 1624561551302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2031551654261 - 2² = 2031551654257 is a prime.

It is a super-2 number, since 2×2031551654261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031551654269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32766962135 + ... + 32766962196.

It is an arithmetic number, because the mean of its divisors is an integer number (524271394656).

Almost surely, 2^{2031551654261} is an apocalyptic number.

It is an amenable number.

2031551654261 is a deficient number, since it is larger than the sum of its proper divisors (65533924363).

2031551654261 is an equidigital number, since it uses as much as digits as its factorization.

2031551654261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65533924362.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 2031551654261 in words is "two trillion, thirty-one billion, five hundred fifty-one million, six hundred fifty-four thousand, two hundred sixty-one".